A method for searching a database of an information retrieval system in response to a query having a query length of at least one word, for applying the query word to the database and selecting information from the database according to the query word. The query is received and the length of the query...http://www.google.com.hk/patents/US5640553?utm_source=gb-gplus-share專利 US5640553 - Relevance normalization for documents retrieved from an information retrieval system in response to a query
Relevance normalization for documents retrieved from an information ...